fix: handle invalid schema data (#106)

* fix: handle invalid schema data

* fix: lint

src/oas2/transformers/__tests__/getExamplesFromSchema.test.ts

@@ -0,0 +1,30 @@
+import { getExamplesFromSchema } from '../getExamplesFromSchema';
+
+describe('getExamplesFromSchema', () => {
+  it('should ignore invalid data', () => {
+    // @ts-ignore
+    expect(getExamplesFromSchema(null)).toEqual({});
+  });
+
+  it('should work with x-examples', () => {
+    expect(
+      getExamplesFromSchema({
+        'x-examples': {
+          'my-example': {},
+        },
+      }),
+    ).toEqual({
+      'my-example': {},
+    });
+  });
+
+  it('should work with example', () => {
+    expect(
+      getExamplesFromSchema({
+        example: 'my-example',
+      }),
+    ).toEqual({
+      default: 'my-example',
+    });
+  });
+});

src/oas2/transformers/getExamplesFromSchema.ts

@@ -3,6 +3,8 @@ import { isObject } from 'lodash';
 import { Schema } from 'swagger-schema-official';
 
 export function getExamplesFromSchema(data: Schema & { 'x-examples'?: Dictionary<unknown> }): Dictionary<unknown> {
+  if (!isObject(data)) return {};
+
   return {
     ...('x-examples' in data && isObject(data['x-examples']) && { ...data['x-examples'] }),
     ...('example' in data && { default: data.example }),